Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/swiftfulthinking/swiftfulstarterproject/adding-packagenpx skills add SwiftfulThinking/SwiftfulStarterProject --skill adding-packagegit clone --depth 1 https://github.com/SwiftfulThinking/SwiftfulStarterProjectWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/swiftfulthinking/swiftfulstarterproject/adding-package)<a href="https://agentmods.dev/skills/swiftfulthinking/swiftfulstarterproject/adding-package"><img src="https://agentmods.dev/badge/skills/swiftfulthinking/swiftfulstarterproject/adding-package.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.01019 |
| Opus 5 | $0.00031 | $0.00509 |
| Sonnet 5 | $0.00012 | $0.00204 |
| Haiku 4.5 | $0.00006 | $0.00102 |
Grade A, and why
adding-package scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Adding Package
Add a Swift Package Manager dependency and wire it into the project.
Steps
- Determine the package name, repository URL, and version requirement
- Instruct the user to add the SPM dependency in Xcode (manual step)
- Determine the integration type (see below)
- Create the Alias file
- If the package provides a service, use the
creating-managerskill to scaffold the manager
Adding SPM Dependency (Manual)
SPM dependencies are added via Xcode — this cannot be done from the CLI for .xcodeproj projects.
Instruct the user:
- In Xcode: File → Add Package Dependencies
- Enter the repository URL
- Set the version rule (usually "Up to Next Major Version")
- Select the library products to add to the app target
Integration Types
| Type | When | Alias File | Manager |
|---|---|---|---|
| Service package | Package provides a service conforming to a manager's protocol (e.g., RevenueCatPurchaseService) |
Yes | Yes — use creating-manager skill |
| Manager package | Package provides a complete manager (e.g., HapticManager, LogManager) |
Yes | Register directly in Dependencies.swift |
| Utility package | Package provides helpers, extensions, UI components (e.g., SwiftfulUI, SDWebImageSwiftUI) |
Optional | No |
Service Package
The package provides a service implementation that plugs into a manager's service protocol. This is the most common pattern.
Example: SwiftfulPurchasingRevenueCat provides RevenueCatPurchaseService conforming to PurchaseService.
- Create the Alias file
- Use the
creating-managerskill to scaffold the manager, using the package's service as the production service implementation
Manager Package
The package provides a complete manager class. No custom service protocol needed.
Example: SwiftfulHaptics provides HapticManager directly.
- Create the Alias file (with typealiases + logger conformance)
- Add manager initialization to
Dependencies.swift(mock + dev/prod) - Register in
DependencyContainer - Resolve in
{RibName}Interactor - Expose methods in the interactor
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 121 lines · 62 tokens per session scan A 763a5ee277ec
adding-package is a skill published in the GitHub repository SwiftfulThinking/SwiftfulStarterProject (74 stars, last pushed 5mo ago), licensed MIT. It adds 62 tokens to every session and 1,019 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
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